package year2021.month11012;

public class HashEqualsTest {

    public static void main(String[] args){
        String str = "123456789";
        str = str.substring(str.length()-6);
        System.out.println(str);

        try {
            ClassLoader loader = ClassLoader.getSystemClassLoader();
            loader.loadClass("className");
        } catch (Exception e){
            System.out.println("异常："+e.getMessage());
            e.printStackTrace();
        }

    }

}
